726 research outputs found

    Second random-phase approximation with the Gogny force. First applications

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    We present the first applications of the second random-phase-approximation model with the finite-range Gogny interaction. We discuss the advantages of using such an interaction in this type of calculations where 2 particle-2 hole configurations are included. The results found in the present work confirm the well known general features of the second random-phase approximation spectra: we find a large shift, several MeV, of the response centroids to lower energies with respect to the corresponding random-phase-approximation values. As known, these results indicate that the effects of the 1 particle-1 hole/2 particle-2 hole and 2 particle-2 hole/2 particle-2 hole couplings are important. It has been found that the changes of the strength distributions with respect to the standard random-phase-approximation results are particularly large in the present case. This important effect is due to some large neutron-proton matrix elements of the interaction and indicates that these matrix elements (which do not contribute in the mean-field calculations employed in the conventional fit procedures of the force parameters) should be carefully constrained to perform calculation

    The Use of Grid Storage Protocols for Healthcare Applications

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    Grid computing has attracted worldwide attention for a variety of domains. Healthcare projects focus on data mining and standardization techniques, the issue of data accessibility and transparency over the storage systems on the Grid has seldom been tackled. In this position paper, we identify the key issues and requirements imposed by Healthcare applications and point out how Grid Storage Technology can be used to satisfy those requirements. The main contribution of this work is the identification of the characteristics and protocols that make Grid Storage technology attractive for building a Healthcare data storage infrastructure

    Effective tensor forces and neutron rich nuclei

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    We study the effects of the tensor term of the effective nucleon-nucleon interaction on nuclear excited states. Our investigation has been conducted by using a self-consistent Random Phase Approximation approach. We investigate various nuclei in different regions of the isotopes chart. Results for a set of calcium isotopes are shown.Comment: 4 pages, 4 figures, 1 table Proc. 10th International Spring Seminar on Nuclear Physics New Quests in Nuclear Structure, Vietri Sul Mare, May 21-25, 201

    04/15/1985 - Weekly Preview Review

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    Conventional RFID readers combine transmission (to the tag) and reception (from the tag) functions in a single physical device. In this paper we discuss the design and potential applications of a receive-only device, called "RFID listener", that decodes the signals from both the tag and the reader. This enables augmented RFID systems where one transmitter coexists with multiple listeners offering reception redundancy and diversity. We present a Software-Defined Radio (SDR) implementation of an RFID listener compliant with Gen2 standard, which can serve as a research tool for experimenting "on air" novel augmented RFID systems. Moreover, our listener can be used as a flexible and cheap protocol analyzer for conventional reader/tag systems. We present a test-bed setting where our listener and a conventional SDR reader are used in conjunction to measure separately the maximum downlink and uplink range. © 2011 IEEE

    Mean-field calculations of exotic nuclei ground states

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    We study the predictions of three mean-field theoretical approaches in the description of the ground state properties of some spherical nuclei far from the stability line. We compare binding energies, single particle spectra, density distributions, charge and neutron radii obtained with non-relativistic Hartree-Fock calculations carried out with both zero and finite-range interactions, and with a relativistic Hartree approach which uses a finite-range interaction. The agreement between the results obtained with the three different approaches indicates that these results are more related to the basic hypotheses of the mean-field approach rather than to its implementation in actual calculations.Comment: 16 pages, 12 figures, 2 tables, accepted for publication in Physical Review

    Epidemiological and virological assessment of influenza activity in Apulia, Italy, during the seasons 2004 - 2005 and 2005 - 2006.

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    This study evaluated the impact of influenza and vaccination coverage in Apulia, Italy, during the 2004–2005 and 2005–2006 seasons, using epidemiological and virological surveillance data collected through the Italian Net of Surveillance of Influenza (InfluNet) organized by the Superior Institute of Health (ISS) and the Inter-University Centre of Research on Influenza (CIRI). Vaccination coverage was calculated from the number of doses administered to individuals aged ≤ 65 years. Sentinel physicians reported weekly influenza-like illness (ILI) and acute respiratory illness (ARI) occurrences among patients. Influenza viruses were isolated and identified by cell culture on Madin-Darby Canine Kidney cells and polymerase chain reaction techniques. Vaccination coverage reached 72.7% and 77.0% during the 2004–2005 and 2005–2006 seasons, respectively. Incidence of ILI was higher during the 2004–2005 season compared with the 2005–2006 season, whereas the incidence ARI appeared to show a more constant trend. Incidence rates for ILI and ARI were higher in the 0 − 14-year age group. The increase in vaccination coverage and implementation of a network of epidemiological and virological surveillance are fundamental for the control and prevention of influenza

    Study for Possible Storage Solutions for Kloe

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    Mode of Delivery in Women with Stillbirth: Results of an Area-Based Italian Prospective Cohort Study

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    Introduction: The choice of the mode of delivery, in case of stillbirth (SB) (fetus non-viable >22 weeks' gestation), should consider maternal preference, gestational age, bishop score, the clinical condition of the woman, and her previous obstetric history. However, despite these clear indications, data on the effective implementation of the latter are lacking. The aim of our study is to evaluate the different modes of delivery in an Italian population of SBs, according to gestational age, parity, causes of death, obstetric history, and maternal characteristics. Material and Methods: This is an area-based, prospective cohort study conducted in Emilia Romagna, Italy between January 2014 to December 2020. Data included all cases of SB (>22 weeks). Results: From 2014 to 2020, 783 SB occurred out of a total of 232.506 births, with a SB rate of 3.3 per 1000. Labor was spontaneous in 85 (11%). Of remnant, 567 (73.6%) were induced and 118 (15.3%) had no labor. The mode of delivery was vaginal in most of the cases (649/770, 84.3%) and by cesarean section in 121/770 (15.7%) of cases. Emergency CS was most frequent and performed in 89/121 (73.5%) of total CS, representing 11.5% of SB deliveries. Mode of induction did not differ in relation to gestational age at stillbirth, while vaginal delivery was significantly higher in women induced with prostaglandins (p = 0.000) respect to other methods. Nulliparous women had a significantly higher need for multiple methods of induction (p = 0.000) respect multiparous and obese women used more frequently prostaglandins (p = 0.03) than other methods. Women with a history of previous CS presented a significantly higher rate of repeated elective CS (p = 0.000). Moreover, emergency CS was performed more frequent in obese (p = 0.02), diabetic (p = 0.04) and hypertensive (p = 0.04) women and in SB caused by placenta disorders, namely in abruptio placentae (p = 0.000). In the case of chorioamnionitis and funisitis women significantly were induced with prostaglandin (p = 0.000) and delivered vaginally (p = 0.000). Conclusions: The method of induction of labor and the mode of delivery in case of SB did not depend on gestational age at the diagnosis of death, while they are related to placenta disorders representing a relevant condition leading to emergency CS also after diagnosis of fetal death. These data could help obstetric providers in managing the deliveries of stillborn infants

    Stillbirth occurrence during COVID-19 pandemic: A population-based prospective study

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    Objectives: Data collected worldwide on stillbirth (SB) rates during the Covid-19 pandemic are contradictory. Variations may be due to methodological differences or population characteristics. The aim of the study is to assess the changes in SB rate, risk factors, causes of death and quality of antenatal care during the pandemic compared to the control periods. Methods: This prospective study is based on the information collected by the Emilia-Romagna Surveillance system database. We conducted a descriptive analysis of SB rate, risk factors, causes of death and quality of cares, comparing data of the pandemic (March 2020-June 2021) with the 16 months before. Results: During the pandemic, the SB rate was 3.45/1,000 births, a value in line with the rates of previous control periods. Neonatal weight >90th centile was the only risk factor for SB that significantly changed during the pandemic (2.2% vs. 8.0%; p-value: 0.024). No significant differences were found in the distribution of the causes of death groups. Concerning quality of antenatal cares, cases evaluated with suboptimal care (5.2%) did not change significantly compared to the control period (12.0%), as well as the cases with less than recommended obstetric (12.6% vs. 14%) and ultrasound evaluations (0% vs. 2.7%). Conclusions: During the COVID-19 pandemic, no significant differences in SB rates were found in an area that maintained an adequate level of antenatal care. Thus, eventual associations between SB rate and the COVID-19 infection are explained by an indirect impact of the virus, rather than its direct effect

    ATLAS and CMS applications on the WorldGrid testbed

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    WorldGrid is an intercontinental testbed spanning Europe and the US integrating architecturally different Grid implementations based on the Globus toolkit. It has been developed in the context of the DataTAG and iVDGL projects, and successfully demonstrated during the WorldGrid demos at IST2002 (Copenhagen) and SC2002 (Baltimore). Two HEP experiments, ATLAS and CMS, successful exploited the WorldGrid testbed for executing jobs simulating the response of their detectors to physics eve nts produced by real collisions expected at the LHC accelerator starting from 2007. This data intensive activity has been run since many years on local dedicated computing farms consisting of hundreds of nodes and Terabytes of disk and tape storage. Within the WorldGrid testbed, for the first time HEP simulation jobs were submitted and run indifferently on US and European resources, despite of their underlying different Grid implementations, and produced data which could be retrieved and further analysed on the submitting machine, or simply stored on the remote resources and registered on a Replica Catalogue which made them available to the Grid for further processing. In this contribution we describe the job submission from Europe for both ATLAS and CMS applications, performed through the GENIUS portal operating on top of an EDG User Interface submitting to an EDG Resource Broker, pointing out the chosen interoperability solutions which made US and European resources equivalent from the applications point of view, the data management in the WorldGrid environment, and the CMS specific production tools which were interfaced to the GENIUS portal.Comment: Poster paper from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 10 pages, PDF. PSN TUCP004; added credit to funding agenc
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